hg status: added options to select files by status. Added options -m, -a, -r and u to select files corresponding to status M, A, R and ? respectively. If none of these options are specified, files of all status will be shown.

\.orig$
\.rej$
~$
\.so$
\.pyc$
\.swp$
^tests/.*\.err$
^build/
^dist/
^doc/.*\.[0-9]$
^MANIFEST$
^\.pc/
^patches/
^mercurial/__version__.py$